Method of pgopagating electbic impulses ijst antenna



0. G. H. E. KEHBHAHN.

METHOD OF PROPAGATING ELECTRIC IMPULSES IN ANTENNE.

nrucmou man ocr. 12. me.

1,325,250 Patented Dec. 16, 1919;

Inventor;

,o'r'ro en. E. KEHRHAHN, or

New ROCHELLE, NEW Yomc I METHOD or raorncarmc ELECTRIC IMBULSES IN Amma 1, 3f25,25@. Specification of To. allrwhom it may concern:

Be it known that LO'rIoG. KEHR- trees, a citizen'ofthe United States, residthe city of New Rochelle, in the county of lVestchester, int-he Stateof New ,Yprk; have invented certain new and useful Improvements 'in Methods of Propagating Electric Impulsesin Antennae, of which the following is a specification, reference being hadto the accompanying drawings, forming 'part hereof. p I I Tlie'o'oject of my invention is. to generate electric impulses in= antennae for the propa-t gation of electromagnetic waves as required in a system of wireless'telegraphy and telephony. 'To obtain theseresults I employ generators in direct connection with antennae and preferably a continuous fcurrentsource -of electric energy, r I y Referring to the accompanying drawings which form part hereof, Figure 1, 1s a diagram showing; the -instrumentalities eniconcentric with the axis of frame f. i represents the material which serves to insulate electrode e from bracket 6. The two ends of'electrode e are provided respectively with istorage knobs kfand k g'represents the gap between-the two ends of electrode. a is' the antennae in direct connection with storage knob lc. (L -represents its grounded companion area directly connected to storage knob 70 p represents platform for driving motor m. p is bearing for motor shaft m 8 represents the insulating sleeve and s is the metallic sleeve of radial. arm 8 which is pro- 'vided with telescoping post-siand set-screw s. '8 represents the Contact. shoe at; extremity of radialarm 8 1' is the, collectingring for taking ofi the current, As shown vin Fig. 2 D. C. represents the source of high-potential electromotive force for electrode e. W is the feed wire and R is the resistance in, the. said wire. -B represents the battery as anrindependent source of energy for'driving motor m. T represents the si-gn ling key in the motorcircuit; 7

- which makes i t,, very desirable; and useful Letters Patent.

With further reference to thedrawings, it will be seen that the fixed electrode'e dc riv-es ts high-potential 'electromotiveeforce' from a continuous current-source through ATENT OFFICE. d

Patented Dec. 16, 1919.- Application filed-October 12,1916. Serial No. 125,231.

feed wi're W connectedfto the positive pole H of dynamo D. C. ,The'radial, arm s constitutes the negative electrode of the system the current being taken ofl"through collecting ringr and returnedtothe-negativepoleof dynamo circuit. I 3 1 M It will be obvious that the size and shape of the instrumentalities employed in. c'arrymg out my invention, may be -modified" within wide ranges and that, if thought expedient, multiples of the device may beset D. Cl therebycompleting the up without in the least departing from the basic principle of this invention, all modifications and rearrangements in this connec scope. v

In operationycontact shoe '8 under action of motor m is moved alongthe inner face of electrode 6 in that way. causing a rush of' tion being considered as comiriglwithin its current toward the storage knob at the respective terminal of the electrode; at the instant the contact shoe leaves that terminal and passes across thegapon'to the other end of the electrode the circuit is first broken andlthen made againresulting in a discharge of current direc'tly into the antennae and setting up powerful electric impulsestherein; the frequencyof these dis- .a

charges of current being dependent upon the action of the motor, which, as will be noted, has its own independentsource of current in battery-B with signaling key P- in the motor circuit for transmittingsignals.

It'will be recognized that a device of the foregoing description has great advanta s as regardsefficiency and reliability un er trymg conditions", it being operative not only man inclosure but also in the open 7 in cases where wireless communications are;

:LOU

carried on in exposed-- places as- ;-for"in board of submarine oats and on connected to the other pole of said source and movable in Contact with the first electrode and across the gap between its ends, means to move the second electrode and antennae connected respectively and directly to the ends of the first electrode.

This specification signed and witnessed this 11th day of October, A. D. 1916.

OTTO G. H. E. KEHRHAHN. Signed in the presence of i H.. FITZGIBBON, STUART E. NAssAw. 

